* The Japanese name for "Catom Bomber" was a combination of "wound," "cat," and "tom" (as in tom cat).
** Assuming "meta" isn't an entirely made-up word, I'd say there are two real possibilities for its origins.
One is that it's based on the English prefix that means "self-referential." Since the PV presents things like a game, it seems like it could refer to "metagaming," i.e. taking it beyond merely having fun.
The other, probably less likely, is that it's the Japanese word "tame" backwards, as "tame" is used when you do something "for" the sake of something. If people were fighting "for meta," it'd be "meta no tame ni."